CEACAM5 and neoplasm: Laboratory tests revealed levels of serum tumor markers: carcinoembryonic antigen (CEA) 0.66 ng/mL, cytokeratin-19 fragment (CYFRA 21-1) 5.7 ng/mL, serum neuron-specific enolase (NSE) 24.17 ng/mL and squamous cell carcinoma antigen (SCC) 3.8 ng/mL.